‘'Dirty DUIs' private investigator gets 8 years OAKLAND (AP) — A disgraced former California police officer involved in the sensational "Dirty DUIs" scandal in which he acknowledged stealing drugs from law enforcement and setting up men for drunken driving arrests was sentenced to eight years in federal prison. Christopher Butler was sentenced Tuesday after he pleaded guilty in May to robbery, conspiracy and extortion as part of a plea deal. The 51-year-old former Antioch police officer-turned-private investigator also was at the center of the drug task force scandal in Contra Costa County.